Headphone



FIG. 1 is a first perspective view of a headphone, showing the new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken lines adjacent the shaded areas represent the bounds of the claimed design while all other broken lines depict portions of the headphone that form no part of the claimed design; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 